Charles r



C. R. KLINE.

FUHNACE INSULAUON.

APPLICATION HLED FEB. 26, 1919.

Patented Oct. 21, i919.

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i' i l Specification ofvLe'tters Patent..

T0 all wlw/m, it muy concern Beit-nacen that I, calmer-sf :Km-Na'- a citizen of the United States, residing atk Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Furnace Insulations, of which the following is a specification.v

My invention relates particularly to househeating furnaces, and it consists in providing improved insulating means therefor adapted to conserve fuel by preventing the Waste of heat which ordinarily occurs through conduction and useless radiation by the apertures necessarily employed; as fully described in connection with the accompanying drawing and specifically pointed out 1n the claim.

Figure 1 is a side elevation of an ordinary house-heating furnace embodying my improved construction.

Fig. 2 is a' sectional detail of a portion of the front Wall of the furnace showing the insulation of the hinged door openings.

The drawing illustrates my invention applied to an ordinary coal-fuel steam or hot Water heater comprising the usual ash-pit portion 5, exterior casing 6, fire-pot 7,`and smoke outlet 8, with fuel apertures 9 and cleaning aperture 10 extending through the front casing; the improvements relating solely to the insulated closure construction provided for the casing apertures in communication with the inclosed heat chamber of the furnace.

Referring particularly to the fire door margin beyondv the metal y, portion of the door; solas f tov provide flans-insulating seating surface 23 adapted to tightly contactwith the seat 17 formed around the casing aperture 9, When the door is closed. The retaining bolt or bolts 21 are preferably embedded in the insulating lining material 20 as indicated. Y

The purpose and effect of this construction is to provide a closure for the aperture which Will in the first place, prevent the taking up of heat by the metal portion of the door from the hot gases that are constantly in direct contact with its inner face; and in the second place, prevent indirect heating thereof by conduction from the necessarily heated metal casing 6; thus avoiding all Waste due to the usual radiation from theV considerable exterior surface of the metal door portion, and keeping the door practically cool for convenient handling.

My invention is particularly shown in connection with .the fire door of a furnace, but may be applied in like manner to the closures of other casing apertures communieating with the heat chamber ofthe furnace,

Vand which ordinarily Wastefully radiate closure as best indicated in cross-section in Y Fig. 2, the casing aperture 9 communicating VWith the fire-pot 7, is formed With a surrounding integrally formed exterior flange 15, against which the usual insulating covering 16 of the furnace abuts; said insulating covering, as shown, extending somewhat beyond thc edge of flange 15 so as to form a Contact scat 17 for the fire door 18. This door comprises a casting of ordinary general form having the usual hingin'g connection to the furnace casing. In my improved construction it is provided With an interior lining 2O of insulating material; which lining is preferably av solidly formed block of such material. having a retaining bolt or bolts 21 in the body thereof extending through the metal wall of the door to rigidly unit-e the same With the latter. This insulating lining, as shown, is extended at its considerable heat directly or indirectly conveyed to them because of the conductivity of their metallic structure; as for instance the cleaning doors ordinarily employ-ed, as indicated at 30, which may be readily Vprotected in substantially the same manner as has been described in connection with the fire-door closure. 'In connection with the usual rear aperture 8 through the casing, for the passage of the products of combustion to the smoke pipe and flue, I employ a separately formed valved connecting box 35 which is insulatedly secured to the furnace casing by interposing a suitably formed seating Washer 3G of insulating material between the abutting faces of the aperture casing and boX respectively; and I provide the damper valve 37 in said box With an insulated facing or facings 38;' and also provide the slide-Way l to direct and indirect radiation of heat is most effectively reduced to a minimum, couservug' the heat Within the lire box and im Pa Rented creasing the eiiiciency of the furnace with a Considerable saying of fuel consumption.

What I claim is In a heating furnace, a metallic casing having an aperture communicating With' a heat chamber of the furnace and bounded by an exteriorly proj eating casing flange, an

Leia-mee plane beyond Said projecting iange, and a metallic closure for Said aperture hinged t0 said casing and having yan insulating covering the interior face of Which is arranged to close against the insulating material forining said closure seat of the casing. y

In testimony whereof I aHiX my signature.

CHARLES R. KLINE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

